Deconstructing therapy outcome measurement with Rasch analysis of a measure of general clinical distress: the Symptom Checklist-90-Revised

Rasch analysis was used to illustrate the usefulness of item-level analyses for evaluating a common therapy outcome measure of general clinical distress, the Symptom Checklist-90-Revised (SCL-90-R; Derogatis, 1994). Using complementary therapy research samples, the instrument's 5-point rating scale was found to exceed clients' ability to make reliable discriminations and could be improved by collapsing it into a 3-point version (combining scale points 1 with 2 and 3 with 4). This revision, in addition to removing 3 misfitting items, increased person separation from 4.90 to 5.07 and item separation from 7.76 to 8.52 (resulting in alphas of .96 and .99, respectively). Some SCL-90-R subscales had low internal consistency reliabilities; SCL-90-R items can be used to define one factor of general clinical distress that is generally stable across both samples, with two small residual factors

ACCULTURATION AND POST-IMMIGRATION CHANGES IN OBESITY, PHYSICAL ACTIVITY, AND NUTRITION: COMPARING HISPANICS AND ASIANS IN THE WATERLOO REGION, ONTARIO, CANADA.

OBJECTIVES: The acculturation hypothesis speculates that as new immigrants get exposed to more obesogenic environments, they progressively acquire the unhealthy lifestyles of the host society, and their obesity risk gradually increases since time of arrival. However, the consistency of the presumed acculturation effect across immigrant groups and gender, and the reasons behind individual changes in lifestyle behaviors remain unclear. Thus, this study investigated the acculturation hypothesis in the Canadian context by comparing two foreign groups, Hispanics and East/Southeast Asians, which present contrasting post-settlement obesity patterns and behavioral trends. Methods: A 41-item questionnaire (including open-ended questions) was administered with 100 first-generation immigrants in the K-W Region to gather information on weight-relatedmeasures, acculturation levels, psychological stress, lifestyle behaviors, and perceived causes of changes in diet and physical activity. A logistic regression analysis was performed to estimate the likelihood of being overweight-obese, while interview transcripts were analyzed to identify response themes and explore causal relationships. RESULTS: Hispanics exhibited considerably higher body mass index levels and larger weight gains, and a nearly nine times higher overweight risk than East/Southeast Asians. Overweight risk was also higher for males and less-educated immigrants. Data collected shows that weight gains were larger for newcomers with high average psychological stress scores, and 38% of Hispanic participants mentioned either stress or depression as causes for their weight gains. The acculturation analysis revealed that East/Southeast Asians were significantly less integrated into Canadian society and more likely to maintain their traditional diets, while both groups reportedperceived-increased levels of recreational physical activity, which contradicts the belief of a linear uniform adoption of unhealthy lifestyle behaviors. DISCUSSION: Results support the notion that the impact of duration of residence does vary by ethnicity and gender. Future prevention efforts should focus on the foreign groups most likely to develop obesity, and pay particular attention to less-educated immigrants, who may be more likely to acquire unhealthy habits after settlement. Results also highlight the emergence of acculturative stress as a significant obesity-risk factor, and support the implementation of obesity preventive efforts that help immigrants manage post-settlement-related feelings of anxiety and depression through the inclusion of social integration strategies. In an increasingly diverse and multiethnic Canada, we expect the dissemination of the research findings to help recent and long-term immigrants to become more aware of obesity-relatedissues, and thus facilitate the adoption of healthier lifestyles after settlement in Canada

The Complex Network of Evolutionary Computation Authors: an Initial Study

EC paper authors form a complex network of co-authorship which is, by itself, a example of an evolving system with its own rules, concept of fitness, and patterns of attachment. In this paper we explore the network of authors of evolutionary computation papers found in a major bibliographic database. We examine its macroscopic properties, and compare it with other co-authorship networks; the EC co-authorship network yields results in the same ballpark as other networks, but exhibits some distinctive patterns in terms of internal cohesion. We also try to find some hints on what makes an author a sociometric star. Finally, the role of proceeding editorship as the origin of long-range links in the co-authorship network is studied as well.Comment: Sociometric study of the Evolutionary Computation community. Submitted to Evolutionary Computation lette

Orientational and induced contributions to the depolarized Rayleigh spectra of liquid and supercooled ortho-terphenyl

The depolarized light scattering spectra of the glass forming liquid ortho-terphenyl have been calculated in the low frequency region using molecular dynamics simulation. Realistic system's configurations are produced by using a recent flexible molecular model and combined with two limiting polarizability schemes, both of them using the dipole-induced-dipole contributions at first and second order. The calculated Raman spectral shape are in good agreement with the experimental results in a large temperature range. The analysis of the different contributions to the Raman spectra emphasizes that the orientational and the collision-induced (translational) terms lie on the same time-scale and are of comparable intensity. Moreover, the cross terms are always found to be an important contribution to the scattering intensity.Comment: RevTeX4, 7 pages, 8 eps figure

Numerical Implementation of the QuEST Function

This paper deals with certain estimation problems involving the covariance matrix in large dimensions. Due to the breakdown of finite-dimensional asymptotic theory when the dimension is not negligible with respect to the sample size, it is necessary to resort to an alternative framework known as large-dimensional asymptotics. Recently, Ledoit and Wolf (2015) have proposed an estimator of the eigenvalues of the population covariance matrix that is consistent according to a mean-square criterion under large-dimensional asymptotics. It requires numerical inversion of a multivariate nonrandom function which they call the QuEST function. The present paper explains how to numerically implement the QuEST function in practice through a series of six successive steps. It also provides an algorithm to compute the Jacobian analytically, which is necessary for numerical inversion by a nonlinear optimizer. Monte Carlo simulations document the effectiveness of the code.Comment: 35 pages, 8 figure

Outline of a multilevel approach of the network society

Social and media networks, the Internet in particular, increasingly link interpersonal, organizational and mass communication. It is argued that this gives a cause for an interdisciplinary and multilevel approach of the network society. This will have to link traditional micro- and meso-level research of social and communication ties (Rogers, Granovetter a.o.) to the macro-level research of the network society at large (Castells a.o.).\ud Systems theory linked to a theory of communicative action establishes a potential basis for a multilevel theory. The systems theory described uses elements of a biologically inspired analysis of networks as complex adaptive systems and the mathematically inspired theory of random and scale-free networks recently elaborated by Barabási, Strogatz and Watts. The outline of the multilevel theory is summarized in ten statements about changing relationships in the network society: an information society with structures and modes of organization primarily shaped by social and media networks. \ud In the last section an inventory is made of the theoretical and methodological changes communication science will have to make to develop a general theory of the information and the network society in the perspective of communication

Modeling health inequities research in context and the minority researcher’s role

Current health inequities research templates are flawed and self-defeating because they do not include historical inequalities as the central context that points to the root causes of health inequities. The context includes structural malformations which are products of the history of colonization and slavery that created racial separation and hierarchies which established Whites as the dominant group and non-Whites (minorities) as the subordinate group. Consequently it is difficult for mainstream researchers to capture the minorities’ core knowledge necessary for the creation of relevant and effective interventions for fundamental and sustainable improvement of their health. This paper proposes a health inequities research model that captures the context of health inequities and the essential and unique role of minority researchers

The representation of women in the family in Spanish television fiction

The rise of television drama in the late nineties challenged comedy as the most popular and resilient genre of fiction. The diversity of themes and growing complexity of new narratives have relegated family representations –key to comedy’s success- to contextualize sentimental and sexual relationships and, to a lesser extent, the work sphere of female characters. This article analyses the context and family relations of 709 female characters represented, with varying degrees of importance, in 84 programs of Spanish television fiction (series, serials, TV movies, miniseries and sketches) premiered in 2012 and 2013. The approach combines quantitative (SPSS coding) and qualitative (socio-semiotics and script theory) methods. The analysis reveals that Spanish television fiction offers a complex picture of family relationships, which mixes clichés and stereotypes, while trying to capture reality. Generational conflicts are the most common misunderstandings in everyday representations of female characters, although most of the women generally have the support of their families to address problems and difficulties of their exciting fictional experiences.El auge del drama televisivo, a finales de los noventa, le disputó a la comedia el protagonismo que la había convertido en el género más popular y resistente de la ficción a lo largo de más de cuatro décadas. La variedad de temáticas y la creciente complejidad narrativa de los nuevos formatos de ficción fueron relegando las representaciones de la familia, la clave del éxito de la comedia, al contexto de los avatares sentimentales, sexuales y, en menor medida, laborales de los personajes femeninos. Este artículo analiza el contexto y las relaciones familiares de los 709 personajes femeninos representados, con un grado variable de protagonismo, en los 84 programas de la ficción televisiva española de estreno (series, seriales, TVmovies, miniseries y sketches), emitidos a lo largo de 2012 y 2013. El método utilizado combina técnicas cuantitativas (codificación en SPSS) y cualitativas (socio-semiótica y script theory). El análisis revela que la ficción televisiva española proyecta una imagen compleja de la familia, en la que se mezclan tópicos y estereotipos, pero que intenta reflejar la realidad. Los conflictos generacionales representen las desavenencias más frecuentes de la vida cotidiana de los personajes analizados, aunque la mayor parte de las mujeres representadas en el contexto familiar suelen contar con apoyo de los suyos para afrontar los problemas y los conflictos de sus azarosas existencias de ficción.Este artículo ha sido elaborado en el marco del proyecto “La construcción social de la mujer en la ficción televisiva y la web 2.0: estereotipos, recepción y retroalimentación” (FEM2012-33411), financiado por el Ministerio de Economía y Competitividad. En esta parte de la investigación han participado, además de las autoras, Deborah Castro, Mariluz Sánchez, Belén Granda, Tatiana Hidalgo, Elsa Soro y Karina Tiznado (investigadoras), y Marc Bellmunt, Germán Muñoz, Lucía Trabajo, Estitxu Garay y Amaia Nerecan (colaboradores)